It is engraved in steel for the identification of the member to be assembled in use

From Japan

On 2014-03-05 15:36:40

Steel materials for applying molten zinc plating, the film thickness is thicker printing becomes difficult to see.
Hard to see the engraved small, ride the degree of force is required plating to be engraved deeply and large quite difficult for unpredictable order related to the zinc flow and reservoir condition.